The HALOTHERM lamps provide a powerful short-wave halogen IR heat lamp (IR-A) with deep-acting heat for fast and efficient results. They consist of a tungsten heating coil and a quartz tube. The filling contains halogen additives in order to avoid blackening of the lamps and to ensure a longer lamp life. Most of these lamps have a maximum radiation at a wavelength of about 1100nm. Quartz glass is highly transparent to infrared radiation up to a wavelength of 4000nm, which ensures that the heat radiation is emitted with minimum loss.